Please use this identifier to cite or link to this item: http://hdl.handle.net/1783.1/8043

聚丙烯酸酯改性聚氨酯水分散体的制备方法

Method for preparing aqueous polyacrylate modified polyurethane dispersions

Authors 袁才登 HKUST affiliated (currently or previously)
陈国华 View this author's profile
张西祥 HKUST affiliated (currently or previously)
李宗津 View this author's profile
刘治猛
Issue Date 2013-04-10
Source 中国专利 , ZL 2008 1 0169501.7, 2013
Summary 本发明公开一种聚丙烯酸酯改性聚氨酯水分散体的制备方法。所述方法包括以下主要几个步骤:a)制备聚丙烯酸酯聚合物或共聚物乳液;b)制备带有羧基的聚氨酯预聚物,并对所述羧基进行中和处理;以及c)在高速搅拌或其它机械混合条件下,通过将聚丙烯酸酯乳液加入到聚氨酯预聚物中来对聚氨酯预聚物进行分散,并使其扩链。当在制备聚丙烯酸酯乳液时使用不饱和的乙酰乙酸基化合物时,可以使得制备得到的聚丙烯酸酯改性聚氨酯水分散体具有自交联性。A novel method for the preparation of an aqueous polyacrylate modified polyurethane dispersion is disclosed. The preparation method includes three main steps: a) preparation of polyacrylate polymer or copolymer emulsion; b) preparation of polyurethane prepolymer with carboxylic groups and neutralization treatment to the carboxylic groups; and c) dispersion and chain-extension of polyurethane prepolymer by adding the polyacrylate emulsion into the polyurethane prepolymer under vigorous agitation, or other mechanical operation. The aqueous polyacrylate modified polyurethane dispersion has self-crosslinkability when an unsaturated acetoacetoxy compound is used for the preparation of the polyacrylate emulsion.
Subjects
Language Chinese
Format Patent
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